Leakage preventing means for concrete mixing receptacles



March .12, 1935. c. F. BALL 1,994,010

LEAKAGE PREVENTING MEANS FOR CONCRETE MIXING RECEFTACLES Filed Dec. 16, 1951 Patented Mar. 12, 1935 UNITED STATES LEAKAGE PREVENTING MEANS FOR CON- CRETE MIXING RECEPTACLES Charles F. Ball, Milwaukee, Wis., assignor to Chain Belt Company, Milwaukee, Wis., a corporation of Wise Application December 16, 1931, Serial No. 581,494

2 Claims.

ficulty has been experienced in the leakage of considerable portions of certain of the constituents, more particularly the water and v cement carried thereby, through these openings. The openings are ordinarily provided in the end walls of the receptacle and are not closed duringv the mixing operation so that the more liquid portions 20 end walls tend to flow downwardly under the influence of gravity as they reachsthe highest point, toward and through the said openings. Since under present day practice the ratio of water to the other constituents is accurately controlled, the loss of such constituent after it has been measured and introduced into the receptacle may prove of extreme importance.

Furthermore, the cementitious mixture which leaks through these openings builds up cumulative hardened deposits on the exterior portions of the receptacle or upon the mixer frame which may require frequent removal by hand. 1

It is therefore the primary object of the present invention to provide a simple and effective means for preventing the loss of the water, and/or of the liquid-carried constituents through the charging and discharging openings.

With the above and other objects in view which will appear as the description proceeds, the invention consists in the novel details of construction and combinations of parts more fully hereinafter described and particularly pointed out in the appended claims.

Referring to theaccompanying drawing forming a part of this specification in whichlike reference characters designate like parts in all the views:

Figure 1 is aside clevational view, partly in paratus. of well known form, the mixing receptacle thereof being supplied with one form of a leakage preventing means constructed in accordance with the present invention;

ings through which the raw materials and the of the mixture as they are carried around by the section, of a portion of a concrete mixing ap- I Figure 2 is an enlarged front elevational view of the leakage preventing means shown in Figure 1;

Figure 3 is anenlarged fragmentary longitudinal sectional view of the means shown in Figures 1' and 2 together with its associated parts; and

Figure 4 is a view similar to Figure 3 showing a slightly modified form of the invention. In the said drawing 5 indicates generally the framework-of the concrete mixing or other similar apparatus which includes upright members 6 and 7. The mixing receptacle 8 is rotatably mounted between the said members 6 and 7 on suitable rollers 9 and the end walls or heads 10 and 11 of the said receptacle are provided respectively with the charging and-discharging openings 12 and 13. A charging chute 14 is associated with the opening 12 while the usual movable discharging chute 15 may be associated with the discharging opening 13.

As above stated during'actual operation it has been found that the water, or the water together with the solid constituents carried thereby, as they reach the uppermost point of the end walls 10 and 11 during rotation of the receptacle, tend toflow downward under the influence of gravity to the edges of the respective charging and discharging openings and splash through said openings to the outside of the receptacle and be lost. In order to overcome this objectionable feature the present invention provides adjacent each opening a channel for receiving such materials as may thus flow downwardly toward the opening, which channel is preferably formed by a member projecting inwardly from the end wall and surrounding said opening so that any material which is received into the channel will be prevented from finding its way through the opening to the exterior and will be returned to the mixture within the receptacle as the latter continues its movement.

The specific means of forming the same channel may vary widely, being here shown as comprising a yielding annulus 16 of rubber or other similarmaterial, which is secured adjacent its outer periphery as by bolts or rivets 17 to a rigid 'metallic ring 18 which in turn is secured as by the bolts 19 to that portion of the end wall such as 11 which immediately surrounds the material transfer opening. The said resilient annulus 16 is reversely bent on itself as will be clear from Figures 1 and 3 and it may be pre-formed to have substantially the. cross-section shown in these figures. 0n the other hand it may likewise take the form of a flat annulus, the inner circumferential portion of which is reversely bent as indicated in Figure 3 during assembly. In either case it is preferred to have the reversely bent portion 20 of the said annulus engaged with the transversely flaring portion 21 of metallic ring or member 22 which may be secured to the frame members such as 6 and 7 and project longitudinally through the respective material transfer opening, as will be readily understood from Figures 1 and 3. The member 22 being fixed while the drum together. with the yielding annulus 16 revolves the reversely bent portion 20 of the said annulus will of course slide over the outer surface of the flaring portion 21 of member 22.

The reverse bending of the resilient annulus provides an annular channel 23 around its outer circumference, which is adapted to receive the materials of the mixture as they flow downwardly over the surface of the end wall such as 11 and prevent such materials from passing through the material transfer opening. Said materials will tend to flow around the channel as will be readily understood and will drop oi! the bottom portion of'ihe annulus thus being retained within the rec tacle The 23 may obviously be formed in other ways thahlthat just described. For example as shown in Figure 4 in some instances the metal of the drum head immediately surrounding an opening such as 13 maybe bent inwardly and downwardly to provide the inwardly projecting annular flange 25 which together with the vertical portion of the drum head forms a channel 23' similar to the channel 23 above described and which will function in the same man- 1181.

It is obvious that those skilled in the art may vary the details of construction as well as the precise arrangement of parts without departing from the spirit of the invention, and therefore it is not wished to be limited to the above disclosure except as may be required by the claims.

What I claim is:

1. In concrete mixing apparatus and the like havinga rotatable mixing receptacle provided with a material-transfer opening, the combination of a non-rotatable member projecting longitudinally through said opening and having a transverse flared portion within the receptacle: and a resilient member carried by the wall of said receptacle, having a portion engageable with the outer surface of said flared portion to provide a running seal and an inward channel surrounding said opening for receiving constituents of the mix moving over the surface of said wall toward the opening and preventing their undesired passage therethrough.

2. In concrete mixing apparatus and the like having a mixing receptacle provided with a material-transfer opening, the combination of a member projecting longitudinally through said opening and having a transverse flared portion within said receptacle; and a resilient member carried by the wall of said receptacle, having a portion spaced from said wall and engaged with the outer surface of said flared portion of the projecting member.

CHARLES F. BALL. 

